How to find the standard form of the equation of the specified circle given Center: (0,0); Radius: 9?

2 Answers
Mar 21, 2018

Answer:

#x^2+y^2=81#

Explanation:

The standard form for the equation of a circle with center #(color(red)a,color(blue)b)# and radius #color(magenta)r# is
#color(white)("XXX")(x-color(red)a)^2+(y-color(blue)b)^2=color(magenta)r^2#

Mar 21, 2018

Answer:

#x^2+y^2=81#

Explanation:

#"the standard form of the equation of a circle is"#

#color(red)(bar(ul(|color(white)(2/2)color(black)((x-a)^2+(y-b)^2=r^2)color(white)(2/2)|)))#

#"where "(a,b)" are the coordinates of the centre and r is"#
#"the radius"#

#"here "(a,b)=(0,0)" and "r=9#

#rArr(x-0)^2+(y-0)^2=9^2#

#rArrx^2+y^2=81larrcolor(red)"in standard form"#